CN102619524A - Construction method for opening off small-section underground chamber of coal mine rock roadway into large-section underground chamber - Google Patents
Construction method for opening off small-section underground chamber of coal mine rock roadway into large-section underground chamber Download PDFInfo
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- CN102619524A CN102619524A CN2012100787554A CN201210078755A CN102619524A CN 102619524 A CN102619524 A CN 102619524A CN 2012100787554 A CN2012100787554 A CN 2012100787554A CN 201210078755 A CN201210078755 A CN 201210078755A CN 102619524 A CN102619524 A CN 102619524A
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Abstract
The invention relates to a construction method for opening off a small-section underground chamber of a coal mine rock roadway into a large-section underground chamber. The construction method comprises the following steps of: drilling and blasting on the top of the rock roadway at a design starting position of the underground chamber at an angle of 70 degrees tilting relative to the longitudinal direction; layering and roof-ripping; clearing by using a scraper loader; brushing the wall while spraying slurry; and the like. The construction method has the advantages of optimizing construction processes, greatly increasing the production efficiency, reducing the labor intensity of workers and increasing the safety coefficient during construction. The construction has high adaptability; the small-section underground chamber can be opened off into the large-section underground chamber on the basis of the conventional small-section rock roadway; the time is saved; and the resource waste is also avoided.
Description
Technical field
The present invention relates to the job practices of chamber under the coal mine, be specifically related to the rock roadway in coal mine light section and expand the job practices of brushing into large-section underground.
Background technology
In operation fields such as down-holes, mine, chamber has obtained application more and more widely, is used to install various device, machine at present, material stored and instrument, or the rest room of being a worker, refuge chamber etc.Because chamber is space structure big at the underground section of digging and building or that length is short; Often be in complex geological conditions, can receive the factor affecting such as factor such as geology state such as geostatic stress, geological formations, underground water and hand excavation's operation of natural formation.Chamber characteristics according to different are carried out different tunneling construction methods; Adopt the full face excavation method to construct like the excavation of traditional big chamber; Promptly be jewel hole of excavated section, blasting in groups according to chamber; And utilize the spoil heap as stamping the borehole of face and the workbench of vault square and skyhook, and then tunnel then and deslagging, finally reach predetermined design.Though this job practices helps improving the mechanized construction degree, the flue dust after explosion and the explosion causes to the workman and comes serious potential safety hazard, and deslagging work must carry out in manual work, and progress is slow.
Quickening along with high-yield and high-efficiency mine construction paces; The function of large-section underground is more and more under the coal mine; More be existing rock roadway in coal mine light section to be expanded brush into large-section underground, main construction method is a construction in layer at present, lower floor behind the first upper strata; Every layer all is through the construction of drilling and blasting, and goes out the upper strata spoil by manual work then.This job practices receives complex process and goes out the cash systematic influence, and efficient is very low, and 30 meters long chambers of construction need nearly 40 day time to accomplish, and bring a lot of potential safety hazards to construction under the normal condition.
The prior art report all is the job practices about chamber, and relate to the rock roadway in coal mine light section is not expanded the job practices of brushing into large-section underground.Like the CN200910227886.2 patent is the introduction to method for constructing underground coal mine chamber of large cross section; Utilize the upper strata to reach construction for the special geologic condition in coal seam carries out the method that the big gun pick combines with the fully-mechanized digging machine coal cutting to chamber for spoil layer, lower floor; But the method need have special requirement to the addressing of large-section underground, do not have general applicability.CN200910237883.7 adopts is slope light section driving before this, step construction again, and its construction speed is slow, is unfavorable for the construction of high-yield and high-efficiency mine.
Summary of the invention
The object of the invention addresses the above problem exactly, provides a kind of rock roadway in coal mine light section to expand the job practices of brushing into large-section underground, and purpose is in order to improve the efficiency of construction of large-section underground, and ensures construction safety, has blanket job practices.
In order to realize the foregoing invention purpose, the present invention adopts following technical scheme:
A kind of rock roadway in coal mine light section expands the job practices of brushing into large-section underground, adopts following construction sequence:
(1) at the rock gangway top, the place ahead of chamber design original position drills and blasts;
(2) continue above-mentioned steps (1) and become fan-shaped and help direction to drill and blast to two, bolting with wire mesh is until the design width of chamber.
(3) layering is carried out in the place of having blown out and caunched, caunch from the bottom up, in time take bolting with wire mesh, until predetermined altitude;
(4), carry out full section construction along the chamber direction; According to chamber top profiled outline, caunch up to the chamber projected depth;
(5) with spoil with the shipment of rake cash machine, on one side shipment whitewash on one side;
(6) temporary lining, two help perforating in the tunnel, behind the enough width of group's brush, adopt the flat drilling depth eye of fetching water to blow out brushing until the chamber design size about treating;
(7) beat portion of group anchor pole, carry out disposable whitewashing then.
Further prioritization scheme of the present invention, the position of drilling and blasting in the above-mentioned steps (1) are at the front 1-3 rice of design chamber original position, locate with 70 ° of angles of fore-and-aft tilt.
Caunch in the above-mentioned steps (3) two layers of branches are chosen following first floor earlier, then choose the second layer to design height to the front upper place.
Brushing described in the above-mentioned steps (6) be before the chamber original position 1-3 rice along chamber direction brushing successively.
Tunnel two described in the above-mentioned steps (6) help perforating be meant according to the tunnel outside prick angle 30-50 ° and two help perforating in the tunnel; The dark 2-3 rice of left side group eye, the dark 1-2 rice of right group's eye; Described horizontal drilling depth eye is blown out, borehole depth 1-2 rice.
In a large amount of colliery underground construction practices, it is widely acknowledged that its key problem is an excavation and support, promptly how to excavate the stability and safety that could more help chamber and safeguard with being convenient to; If want supporting, how supporting could guarantee more effectively that chamber is stable and be convenient to excavation again.These two factors have determined in Chamber Construction, need take corresponding job practices to the characteristics of chamber, have both helped the safety of constructing, and the supporting that helps cave again is with stable.
The present invention is on the light-gauge basis of existing rock gangway; Make full use of to expand then and brush large-section underground; Job practices of the present invention is earlier to shift to an earlier date the 1-3 place by become 70 ° of angles to drill and blast at the top, tunnel with the level angle oblique upper in the design original position, makes section form a slope, the security threat when having avoided vertical perforating; Promptly help cash, be convenient to workman's construction again.Carrying out layering then caunches; After choosing design height, the staff stands on the spoil method construction of adopting a perforating full face blasting, blows out number of times when having reduced construction in layer; Owing to adopt onepull; Personnel need not construction in layer, have reduced the danger because of the whole slump of construction lower floor on the upper strata, the safety factor when having improved construction.Adopt the shipment of rake cash machine, the whitewashing of shipment limit, limit need not artificial shipment, blows out number of times when having reduced construction in layer, has reduced labour intensity, all adopts the shipment of rake cash machine during construction, has improved labor productivity, has alleviated working strength of workers.Entire method has been optimized working procedure, has further improved production efficiency, and the 30m chamber of specifically constructing only needed just can accomplish in 25 days, accomplishes in 15 days in advance than job practices in the past.
Beneficial effect of the present invention:
1, tilt 70 ° at the top, tunnel to drill and blast, make section form a slope, the security threat when having avoided vertical perforating promptly helps cash, is convenient to workman's construction again.
2, adopt the method construction of a perforating full face blasting, blow out number of times, the safety factor when having improved construction when having reduced construction in layer; All adopt the shipment of rake cash machine during construction, alleviated working strength of workers, improved labor productivity.
3, job practices of the present invention has been optimized working procedure, has further improved production efficiency, has alleviated working strength of workers.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed description.
Fig. 1 is the sectional view of chamber of the present invention;
Fig. 2 is the front view of chamber;
Among the figure: the existing rock gangway of 1-, 2-chamber top, 3-first floor, the 4-second layer, 5-and longitudinal angle, portion of 6-chamber group.
The specific embodiment
Come the present invention is done further explanation below in conjunction with specific embodiment, these embodiment are not limited only to protection scope of the present invention, and all are based on basic thought of the present invention and all belonging in protection scope of the present invention of making amendment or change.
Embodiment one:
Shown in Figure 1 is the sectional view of chamber of the present invention, i.e. the construction sequence of chamber top team 2, during construction, at rock gangway 1 top, 2 meters, the place ahead of chamber design original position, by with fore-and-aft tilt angle 5 be that 70 ° of directions are drilled and blasted.Divide two layers to caunch then, caunch from the bottom up, choose following first floor earlier, carry out the top board bolting with wire mesh after, then choose the second layer, carry out the top board bolting with wire mesh again, reach the design height that caunches during to the precalculated position.
Embodiment two:
Fig. 2 is the front view of chamber, the shape of the back chamber of promptly constructing, the part of dash area for constructing among the figure.
On the basis of existing rock gangway 1, expand and brush into large-section underground, drilled and blasted in the top 2 of chamber earlier, again layering top, gunite at last; Again to the portion of group 6 of chamber along chamber direction brushing successively, gunite, form the large-section underground that is designed at last.
Embodiment three:
With Qian Ying colliery 3211 air ways serves as that the basis expands that to brush into large-section underground be example, solves the needs that Qian Ying colliery 3211 work planes are installed the driving of lifting fully mechanized mining supporter, construction one assembling chamber in 3211 air ways join the lane chamber.The rough section of the chamber of design reaches: wide 7.6m, high 8.093m, basal area 61.5m
2Net section is wide 7.4m, and is high by 7.993, basal area 59.15m
2, construction length 30m.
The rock gangway light section expands the job practices of brushing into large-section underground, and this method is to adopt following job practices to realize:
(1) at the rock gangway top, 2 meters, the place ahead of chamber design original position, by drilling and blasting, carry out bolting with wire mesh behind the big gun with 70 ° of directions of fore-and-aft tilt;
(2) continue above-mentioned steps (1) and become fan-shaped and help direction to drill and blast to two, bolting with wire mesh is until the design width of chamber.
(3) divide two layers to caunch to the place of having blown out, caunch from the bottom up, choose the lower floor top earlier, carry out the top board bolting with wire mesh then, then choose last layer, carry out the top board bolting with wire mesh again, reach the design height that caunches during to the precalculated position.If do not reach design height when reaching the precalculated position, can adopt the mode of putting little big gun to brush and choose height greatly;
(4) along the chamber direction; Tap and look for clean cash crag alive, hang up properly qualified regular anti-wall caving net after, the staff stands on the spoil again and to bore once eye; Carry out the job practices of full face blasting and construct, caunch up to the chamber projected depth according to chamber top profiled outline;
(5) spoil is carried out shipment with rake cash machine, the shipment on one side of rake cash machine, another side carries out gunite to the chamber top; Promptly stir and form, make mixture under compressed-air actuated effect, be transported to the nozzle place through flexible pipe by concrete sprayer with materials such as sandstone material, cement and accelerating admixtures; Add the water mixing at the nozzle place and form the material bundle, the high speed sprayed coating is on the country rock surface, at country rock surface formation one deck layer of concrete; Combine with self, realize the support form of roadway support, and can seal country rock and make it not contact with adverse environment; Slow down its weathering or destruction, reach the effect of supporting surrounding rock of chamber.
(6) from preceding 2 meters of chamber original position along chamber direction brushing successively.Tap earlier, establish temporary lining, according to the tunnel outside prick 40 ° of angles and two help perforating in the tunnel, the dark 2400mm of left side group eye dials group's back left shoe and brushes wide 2050mm, the dark 1400mm of right group's eye dials group's back right shoe and brushes wide 950mm.After the enough sizes of group's brush, adopt the flat drilling depth eye of fetching water about treating, borehole depth 1600mm behind the blast firing of powder charge, taps, prevents danger.
(7) etc. with accomplishing fluently portion of group anchor pole after the enough sizes of portion of group brush, with the shipment of rake cash machine, help the country rock surface to carry out disposable gunite to chamber two at last again.
Build up wide 7.4m at last, high 7.993m, basal area 59.15m
2, length is the large-section underground of 30m, time-consuming amounting to, drew 25 days, accomplished in 15 days in advance than job practices in the past.And the needs that Qian Ying colliery 3211 work planes are installed the driving of lifting fully mechanized mining supporter have been solved.
Job practices of the present invention has been optimized working procedure, has improved production efficiency greatly; And reduced working strength of workers, the safety factor when having improved construction.Compliance of the present invention is strong, on the basis of existing small cross section mine rock roadway, brushes into the chamber of big section with regard to satisfying expansion, the both brief time, has avoided the wasting of resources again.
Claims (5)
1. a rock roadway in coal mine light section expands the job practices of brushing into large-section underground, and it is characterized in that: this method adopts following construction sequence:
(1) at the rock gangway top, the place ahead of chamber design original position drills and blasts;
(2) continue above-mentioned steps (1) and become fan-shaped and help direction to drill and blast to two, bolting with wire mesh is until the design width of chamber.
(3) layering is carried out in the place of having blown out and caunched, caunch from the bottom up, in time take bolting with wire mesh, until predetermined altitude;
(4), carry out full section construction along the chamber direction; According to chamber top profiled outline, caunch up to the chamber projected depth;
(5) with spoil with the shipment of rake cash machine, on one side shipment whitewash on one side;
(6) temporary lining, two help perforating in the tunnel, behind the enough width of group's brush, adopt the flat drilling depth eye of fetching water to blow out brushing until the chamber design size about treating;
(7) beat portion of group anchor pole, carry out disposable whitewashing then.
2. a kind of rock roadway in coal mine light section according to claim 1 expands the job practices of brushing into large-section underground, it is characterized in that: the position of drilling and blasting in the step (1) is at the front 1-3 rice of design chamber original position, locates with 70 ° of angles of fore-and-aft tilt.
3. a kind of rock roadway in coal mine light section according to claim 1 expands the job practices of brushing into large-section underground, it is characterized in that: two layers of the branches of caunching in the step (3), choose following first floor earlier, and then choose the second layer to design height to the front upper place.
4. a kind of rock roadway in coal mine light section according to claim 1 expands the job practices of brushing into large-section underground, it is characterized in that: the brushing described in the step (6) be before the chamber original position 1-3 rice along chamber direction brushing successively.
5. a kind of rock roadway in coal mine light section according to claim 1 expands the job practices of brushing into large-section underground, it is characterized in that: the tunnel two described in the step (6) help perforating be meant according to the tunnel outside prick angle 30-50 ° and two help perforating in the tunnel; The dark 2-3 rice of left side group eye, the dark 1-2 rice of right group's eye; Described horizontal drilling depth eye is blown out, borehole depth 1-2 rice.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210078755.4A CN102619524B (en) | 2012-03-16 | 2012-03-16 | Construction method for opening off small-section underground chamber of coal mine rock roadway into large-section underground chamber |
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| CN201210078755.4A CN102619524B (en) | 2012-03-16 | 2012-03-16 | Construction method for opening off small-section underground chamber of coal mine rock roadway into large-section underground chamber |
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Cited By (7)
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| CN102979534A (en) * | 2012-12-11 | 2013-03-20 | 安徽恒源煤电股份有限公司 | TU shed support process |
| CN105041323A (en) * | 2014-12-31 | 2015-11-11 | 龙口矿业集团有限公司 | Three-incompetent bed cutting hole large section construction and supporting method |
| CN105937395A (en) * | 2015-09-14 | 2016-09-14 | 安徽建筑大学 | Fast and highly-efficient tunneling method for large section of hard-rock tunnel in coal mine by combination of fully-mechanized tunneling and blasting driving |
| CN106121689A (en) * | 2016-08-22 | 2016-11-16 | 福州大学 | A kind of excavation method of non-coal mine underground large stable chamber |
| CN106285731A (en) * | 2016-08-05 | 2017-01-04 | 湖南科技大学 | The little courtyard radiant type of a kind of high Large chamber and the mixed construction method of step |
| CN109707384A (en) * | 2018-12-18 | 2019-05-03 | 山西宏厦第一建设有限责任公司 | A kind of construction method of coal mine shield machine dismantling chamber |
| CN110541711A (en) * | 2019-09-03 | 2019-12-06 | 山东唐口煤业有限公司 | method for strengthening underground chamber brush |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979534A (en) * | 2012-12-11 | 2013-03-20 | 安徽恒源煤电股份有限公司 | TU shed support process |
| CN102979534B (en) * | 2012-12-11 | 2015-12-02 | 安徽恒源煤电股份有限公司 | A kind of TU canopy support process |
| CN105041323A (en) * | 2014-12-31 | 2015-11-11 | 龙口矿业集团有限公司 | Three-incompetent bed cutting hole large section construction and supporting method |
| CN105937395A (en) * | 2015-09-14 | 2016-09-14 | 安徽建筑大学 | Fast and highly-efficient tunneling method for large section of hard-rock tunnel in coal mine by combination of fully-mechanized tunneling and blasting driving |
| CN105937395B (en) * | 2015-09-14 | 2018-10-26 | 安徽建筑大学 | A kind of comprehensive dig of coal mine big cross section hard-rock tunnel combines rapidly and efficiently driving method with big gun pick |
| CN106285731A (en) * | 2016-08-05 | 2017-01-04 | 湖南科技大学 | The little courtyard radiant type of a kind of high Large chamber and the mixed construction method of step |
| CN106121689A (en) * | 2016-08-22 | 2016-11-16 | 福州大学 | A kind of excavation method of non-coal mine underground large stable chamber |
| CN109707384A (en) * | 2018-12-18 | 2019-05-03 | 山西宏厦第一建设有限责任公司 | A kind of construction method of coal mine shield machine dismantling chamber |
| CN110541711A (en) * | 2019-09-03 | 2019-12-06 | 山东唐口煤业有限公司 | method for strengthening underground chamber brush |
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